Feed device for drilling-machines



(No Model.)

' H. BIGKFORD.

Feed Device for Drilling Machines.

Patented Feb. 15,1881.

Lllill] I nventor M I .m i F v UNITED STATES PATENT OFFICE.

HENRY BICKFORD, OF CINCINNATI, OHIO,

FEED DEVICE FOR DRILLING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 237,722, dated February15, 1881.

Application filed September 15, 1880.

To all whom it may concern:

Be it known that l, HENRY BIOKFORD, of Cincinnati, Ohio, have invented anew and useful Improvement on Drilling-Machines, of which the followingis a specification.

My invention relates to feeding devices for drilling mechanism; and itconsists in a new and useful quick-return mechanism to be used inconnection with the ordinary feed device, as will be hereinafter morefully specified and definitely claimed. I

In the accompanying drawings, Figure 1 is a vertical elevation of adrilling-machine with my improved quick-return mechanism shown asattached to a well-known feeding device. Fig. 2 is a perspective view ofthe feeding device of a drilling-machine with my improved quick returnattached thereto; and Fig. 3 is a longitudinal sectionalview of themechanism used for feeding or for quick return.

Letters of like character in each of the fig- .ures representcorresponding parts of the ma- ,chine. I

The customary drill-spindle A and rack B, with its pinion C, areattached to and driven by a disk, E, by means of shaft 01. When it isdesired to feed rapidly or to have a quick return of the drill, the diskE is rotated by a lever, f, by which means the drill-spindle may beelevated or depressed while the gradual feed mechanism remainsstationary. This is accomplished by tilting the lever f into theposition represented by dotted lines f which (No model.)

D then being loose upon shaft 01 remains detached until the projection cof lever f again engages in the cavities 0. Then the whole feedingmechanism is again connected and may be rotated by hand-Wheel F.

The lever f is pivoted through the center of disk E by pin '5, and theend upon which the projection c is formed is provided With a conepointedpin, a, which is forced, by a spring beneath it, into a correspondingcone-shaped receptacle formed in cap m of disk E, and the projection cof lever f engages with cavities 0 of worm-wheel D, and is thus kept inposition until purposely forced out.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

In a drilling-machine, the disk E, with pivoted lever f, having aprojection,c, constructed to engage with cavities 0 in disk E, incombination with the customary feeding mechanism of a drilling-machine,as and for the purpose specified.

In testimony whereof I have hereunto set my hand.

HENRY BICKFORD.

Witnesses HENRY MILLWARD, THEODORE HORSTMAIN.

